Oakview2 & Son,
Welcome to both of you to the site, your "NEW" GMT and loads of time together looking for great targets! Being out with children & family members IS the best Find you will ever have, I have three now grown children who still talk about their trips with Dad out into the hills, Wonderful Memories for all of us.
You have a great machine, I know I own one though it has a few scratches in it. The best thing I ever did for myself and my GMT was to read the manual over and over and carry a copy of it with me, this is because I do not get a chance to use it all year so I get rusty. I've just purchased a set of TDK WR700 wireless headphones for my detecting and they are Great. Got them at NewEgg and they had a coupon for another $10 off. Better than the price is how well they work with the GMT, my DVD player and everything else I have that sends out a signal. No more cords caught up in bushes.
I also have the smallest coil as well as the largest coil, the smallest coil makes real sense to own while the largest coil has limited use due to its size and weight. Whites has a program called "customer stories" and when a customer sends in a story about how they used their Whites detector especially with a few pictures of the find showing the detector "out there" they may want to use your story on their website. To gain your permission to use your story they offer a generous coupon good for Whites Accessories like COILS. The coupons I've received for each or my stories were both for $100 towards accs. I purchased the large coil using one of the coupons and the other coupon I was allowed to use for repairs to my XLT AND with the funds not used for repair they included Whites incidentals and they are handy. What I'm getting at is that your wonderful time has just started depending on your choice of what you do with the detector. Even out in the mountains it is a very Wise policy to refill your search holes ESPECIALLY with the current atmosphere in California with all forms of the Government that is supposed to 'serve' us ORDERING us out of our own forests, rivers and streams and taking away our rights to be out there.
With the detector, be sure and try using the machine on maximum settings as the filtering in the machine changes over when used at max settings, this is covered with a brief note in the manual. My GMT has sniffed out various amounts of gold, not major quantities but any amount is fun to find.
I wish you Great Success and enjoyment ............63bkpkr